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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2015 ZeroTier, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#ifdef ZT_ENABLE_CLUSTER
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <signal.h>
#include <errno.h>
#include <iostream>
#include "ClusterGeoIpService.hpp"
#include "../node/Utils.hpp"
#include "../osdep/OSUtils.hpp"
#define ZT_CLUSTERGEOIPSERVICE_INTERNAL_CACHE_TTL (60 * 60 * 1000)
namespace ZeroTier {
ClusterGeoIpService::ClusterGeoIpService(const char *pathToExe) :
_pathToExe(pathToExe),
_sOutputFd(-1),
_sInputFd(-1),
_sPid(0),
_run(true)
{
_thread = Thread::start(this);
}
ClusterGeoIpService::~ClusterGeoIpService()
{
_run = false;
long p = _sPid;
if (p > 0) {
::kill(p,SIGTERM);
Thread::sleep(500);
::kill(p,SIGKILL);
}
Thread::join(_thread);
}
bool ClusterGeoIpService::locate(const InetAddress &ip,int &x,int &y,int &z)
{
InetAddress ipNoPort(ip);
ipNoPort.setPort(0); // we index cache by IP only
const uint64_t now = OSUtils::now();
bool r = false;
{
Mutex::Lock _l(_cache_m);
std::map< InetAddress,_CE >::iterator c(_cache.find(ipNoPort));
if (c != _cache.end()) {
x = c->second.x;
y = c->second.y;
z = c->second.z;
if ((now - c->second.ts) < ZT_CLUSTERGEOIPSERVICE_INTERNAL_CACHE_TTL)
return true;
else r = true; // return true but refresh as well
}
}
{
Mutex::Lock _l(_sOutputLock);
if (_sOutputFd >= 0) {
std::string ips(ipNoPort.toIpString());
ips.push_back('\n');
//fprintf(stderr,"ClusterGeoIpService: << %s",ips.c_str());
::write(_sOutputFd,ips.data(),ips.length());
}
}
return r;
}
void ClusterGeoIpService::threadMain()
throw()
{
char linebuf[65536];
char buf[65536];
long n,lineptr;
while (_run) {
{
Mutex::Lock _l(_sOutputLock);
_sOutputFd = -1;
_sInputFd = -1;
_sPid = 0;
int stdinfds[2] = { 0,0 }; // sub-process's stdin, our output
int stdoutfds[2] = { 0,0 }; // sub-process's stdout, our input
::pipe(stdinfds);
::pipe(stdoutfds);
long p = (long)::vfork();
if (p < 0) {
Thread::sleep(500);
continue;
} else if (p == 0) {
::close(stdinfds[1]);
::close(stdoutfds[0]);
::dup2(stdinfds[0],STDIN_FILENO);
::dup2(stdoutfds[1],STDOUT_FILENO);
::execl(_pathToExe.c_str(),_pathToExe.c_str(),(const char *)0);
::exit(1);
} else {
::close(stdinfds[0]);
::close(stdoutfds[1]);
_sOutputFd = stdinfds[1];
_sInputFd = stdoutfds[0];
_sPid = p;
}
}
lineptr = 0;
while (_run) {
n = ::read(_sInputFd,buf,sizeof(buf));
if (n <= 0) {
if (errno == EINTR)
continue;
else break;
}
for(long i=0;i<n;++i) {
if (lineptr > (long)sizeof(linebuf))
lineptr = 0;
if ((buf[i] == '\n')||(buf[i] == '\r')) {
linebuf[lineptr] = (char)0;
if (lineptr > 0) {
//fprintf(stderr,"ClusterGeoIpService: >> %s\n",linebuf);
try {
std::vector<std::string> result(Utils::split(linebuf,",","",""));
if ((result.size() >= 7)&&(result[1] == "1")) {
InetAddress rip(result[0],0);
if ((rip.ss_family == AF_INET)||(rip.ss_family == AF_INET6)) {
_CE ce;
ce.ts = OSUtils::now();
ce.x = (int)::strtol(result[4].c_str(),(char **)0,10);
ce.y = (int)::strtol(result[5].c_str(),(char **)0,10);
ce.z = (int)::strtol(result[6].c_str(),(char **)0,10);
//fprintf(stderr,"ClusterGeoIpService: %s is at %d,%d,%d\n",rip.toIpString().c_str(),ce.x,ce.y,ce.z);
{
Mutex::Lock _l2(_cache_m);
_cache[rip] = ce;
}
}
}
} catch ( ... ) {}
}
lineptr = 0;
} else linebuf[lineptr++] = buf[i];
}
}
::close(_sOutputFd);
::close(_sInputFd);
::kill(_sPid,SIGTERM);
Thread::sleep(250);
::kill(_sPid,SIGKILL);
::waitpid(_sPid,(int *)0,0);
}
}
} // namespace ZeroTier
#endif // ZT_ENABLE_CLUSTER
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